As far as I know, all the new top of the line cards have been pretty much released first in PCI-E, or at least at the same time. You can look here , and find all the cards you mentioned, I think. And the 9800 is an ATi card, I presume you meant the nVidiia 6800?

Edit: The link I provided won't take you to the page I wanted. But you can do a search for PCI-E cards, $400 plus and you will find the cards you mentioned.